﻿using System;
using System.Numerics;

class HundredFactorialInArray
{
    static void Main()
    {
        int factorial = 3;

        CalculateFactorial(factorial);
    }

    private static void CalculateFactorial(int factorial)
    {
        BigInteger result = 1;
        for (int i = 2; i <= factorial; i++)
        {
            result *= i;
        }

        Console.WriteLine(result);
    }
}